N4w Oil Seal, or Wr Wear, or Ring Back Up are used in hydraulic cylinder, prevent the direct touch and friction between piston and cylinder, wear-resistant, aging resistant and airtight are the good features.N4w Oil Seal, or Wr Wear, or Ring Back Up. They are used in hydraulic cylinder or cylinder, supporting the piston or piston rod. The main function is to prevent the direct touch and friction between the piston and cylinder, lead to the protection of the cylinder and piston. Wear-resistant, aging resistant and airtight are their good features.1. Products Name: N4w Oil Seal, or Wr Wear, or Ring Back Up2. Applications: hydraulic cylinder or cylinder3. Place of Origin: Hebei Province, China4. Supply Ability: 10000pcs per week5. Products Pictures:6. Specifications:N4w Oil Seal/ Wr Wear/Ring Back UpMaterialPTFE, MCHardness17~88 Shore ATemperaturePTFE(-260~260℃); MC(-10~200℃)ColorRed, Black, Blue, ClearFeaturesAging-resistant; Heat-resistant; Abrasion-resistant;airtightWelcome to Beijing Rubber-King!